Keyboard mechanism for type-writers.



No. 657,438. Patented Sept. 4', 1900. c. P. musuen.

KEYBOARD MECHANISMFOR IY-P'E W RIIERS.

(Application filed Jan. 3m. 1900 (No Model.) 3 Sheets-Sheel I.

m: Nonms FETERS do, PNOTU-LII'HO WASHINGTOIL a. Q

Patented se ty4, 1900.

C. P. 'MDSHER. KEYBOARD MECHANISM FOR TYPE WRITERS.

(Application filed Jan. 31, 1900.

3 Sheets-Sheet 2.

(No Model.)

rm: nonms PETERS 00.. rnoro'wmuq bum-Mammy c.

Patented Sept. 4, I900. C. P. MQSH ER" KEYs5QABfDMEGHANISMi FER TYPE WRITERS.

(Application 1114235, $5.11, 3) 19000 3 SheetsSheet 3.

(No Model.)

w: mums PETERS 00,. moroun'wu wnsmuorou. n, c.

lines the key-leverswill mdve on vertical lines 1 tached to levers in any suitable manner and 3 machine, illustrating my invention.

UNITED STATES PATENT 'OFFicn.

"cHARLEs P. MOSHER, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TO T. HENRY ASBURY, or SAME PLACE.

KEYBOARD MECHANISM FOR TY PE-WRIl'ER S.

SPECIFICATION forming part of LettersPatent No. 657,438, dated September 4, 1 9oo-.

Application filed January 31,1900. Serial No. 3,429. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES P. MOSHER, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Keyboard Mechanism for Type-Writers, of which the following is a specification. i

My invention relates to certain impr0vements in type-writing machines in which the type is visible.

The object of my invention is-to improve the construction of the key-lever mechan'ism, so that while the type-bars move on radial This object I attain in the following manner, reference being had to the accompanying drawings, in which Figure 1 is a front view of a type-writing is a sectional View of the machine shown in Fig. 1, the type-bars being at rest. Fig, 3 is a viewsimilar to Fig. 2,showing a type-bar in action. Fig. 4 is a perspective View showing the parts detached, and Figs95 and Gare the platen'O, which in the present instance is in the form of a roller. In front of the roller is the inking mechanism;

lever being connected toan arm (1 of a two-:

armed lever i This lever. is pivoted at (1 to the frame of the machine. The other arm d of the lever D is shaped as clearly shown in Fig. 2, having a rounded end adapted to a cavity formed by the two arms 6 and e of the type level-or bar E. Thistype-lever is pivoted at f to the machine and has a long arm 9 carrying at its outer end the type g,

which when the bar is raised to strike, shown in Fig. 3, is in position directly opposite the platenQ- The connection between the lever B and the lever D is simply a rod 0,

position, while the intermediate lever D. and the type-lever E may be arranged on other lines, for instance radiating from a common 1 center, as in Fig. l, which is the arrangement I on the ordinary forms of machines in which I the writing is visible.

The connecting-rod c in the present instance is made of wire atbent in the form of aloop 0, so that the length r of the rod can be regulated by simply increasing or diminishing the loop.

I is a spring for returningthe key and type levers to their normal. positions. I provide a spring for each key-lever. I prefer-to use a spring of the shape shown in Figs. 2 and 4. Thespring I is made of light spring-wire, bent as shown, and secured at its lower endto a cross-bar A of the machine; The'upper end passes through an opening in the arm 19 of.

the key-lever. In some instances whenthe arm I) of the key-lever B or the arm 6 of the type-bar E is'of suflicient' weight the spring mediate levers can be pivoted in curved lines,

so that the type will strike at a central point. When the key-levers are depressed, they move on vertical lines, while the type-bars and intermediate levers move on radial lines, the

connections between the key-levers and the intermediate levers being such as to allow for this movement. The positionof the arms of the two levers D and E issuoh that when the ofthe type-lever will gradually increase in speed as the arm (1 comes in cont-act with the end of the arm 6, and as the type-lever is key-levers arev pressed down the movement raised the bearing-point changes until the mal position."

By gearing the intermediate lever with the type-lever in the manner described I am enabled to-strikeaquick and powerful blow with the type levexflso that the machinecan It being necessary th se of th spe ial formsqf engaging; arms? n the intermediateand the type leve rls whereby there is ac'ontinuousrolliug ni-otioti; t between them; The uniform downward f tion; of a keyresults in an accelerated motion,

end of the lever d is directly at the root of the lever e. As soon as the key-lever is released the spring I will cause the arm d of the lever D to come in contact with, the arm e', and thus return the type-lever to its uorbe used for-manifolding and; producing a great numberof copies, and at the, Same time the machine will-have an easy action, as the first'movement to move the type-barintopo- J I sition will be produced when the'leverage is extended.

this starting shou'ld'be easy and unMiQ m-T panied' by any jerks or variations in the pres-- s e. r qu red n the keys. This I secure by',

of the typelevers duze to, thevariation in: the

- 1' leverage between their respective pivots.

The rebound of thera idly-movingtypezlever from the; platen is of 'material 1 assistance in returning the, same to its normal position, r

. .1 I iK EigQ-5 I have shown a modificationoi detailsof my invention. Inplace ofusinga; looped; rod c; as'in Fig. 4,,Ijrnay use two rods c, ool llllected I hyaa eoupling ck and; the spring" may be'a coiled spring-connectedeto thQ SCKEQW chine, a d o icgstm may be; two nuts ,c I Q i 65%,433

type. The key l'ever is pivoted at therear and asprin-g Ptends to keep the lever up into the normal position. Thislever is connected to the arm of the lever D by a connecting-rod 0,-imade adjustable and forked to pass over the thinkey-lever B, Thus byhaving this rod connection I am enabled to set the levers vLD'and E out o-f'line with the key-leverB..

I claim as my invention '1. The combination in'a. keyboard mechanism for type-writing machi'nes of a key-lever; a type-lever, an arm on the type=lever having its acting face resembling a gear-tooth in outl'ine, an intermediate lever o'fithe bell-crank type with onearm for'connection to the keylever, and the other arm-engaging the acting s I 'face of the arm the type-lever, and a link to start the type-ban from allor zontal position it is desirable that a connecting the intermediateleverwith the keylever the'saidiutermediat 1e. Yek' and the arm. of thcty pe lever meshing together "with a continuous rolling motion when the key-lelike. ngu s 6, andathree-armed type-lever having: two. of itsai'ms in the. same. plane as thoseolf thesaidltwo-armcd, lever, one of said ype-lever arms e3 carrying the ype a second arm slicing approximately theshape oi a geartooth and'with the third typelever; arm. 6'

QQllStL'uctedto-engage thetwo-armed lever D, and from their fo-rm,fsec;uring a continuous rollingcontactmtwehtheirbearing surfaces du ing-operation, substantially as described.

11- In testimony whereofj 'I have; signedmy hichthetensi0 oftheispring can bezregwi t luFig. .6 Ihaveshowna modification-adapt I ecite-machine s usingastraightke -lever,- such v I CHARLES 1 MOISH R." j

BARR, 

